Linked Questions

9
votes
1answer
3k views

What is an AMDF?

The wikipedia page for Average Magnitude Difference Function/Formula (AMDF) appears to be empty. What is an AMDF? What are AMDF's properties? What are AMDF's strengths and weaknesses, as compared ...
4
votes
2answers
297 views

How can I measure the harmonicity of an audio spectrum?

I would like to estimate the "harmonicity" (harmonics-to-noise ratio ?) of an audio signal from its spectrum. What kind of algorithm can I use?
3
votes
4answers
1k views

Advice on autocorrelation via FFT

I have been creating an application in Java that transforms an audio signal and writes it to a midi file. At first I tried using autocorrelation to find the fundamental frequency. However, I have ...
1
vote
1answer
2k views

Determining the fundamental frequency/pitch of a note

What I am trying to achieve is getting the fundamental frequency of a note played by an instrument. What I have already done is performing an FFT on a samples of audio file, and here's what I get: ...
1
vote
2answers
699 views

Using Fast Fourier Transform to determine musical notes

Hi guys i am doing a course in Digital Filters and Spectral analysis. We are given a coursework/homework, and I have absolutely no idea what to do with it. I come from Maths background, never done any ...
0
votes
1answer
1k views

YIN pitch estimation algoritm-simplified explanation [closed]

can someone please explain the steps of YIN pitch detection algorithm in a simple way "especially the last 3 steps". here is the research paper of YIN algorithm http://audition.ens.fr/adc/pdf/...
0
votes
1answer
661 views

What's wrong with this Average Magnitude Difference algorithm?

I implemented this Average Magnitude Difference algorithm in Javascript ...
0
votes
1answer
527 views

Periodicity of peaks within a signal

I have a signal, in which i want to detect the period of the peaks, that exist within this signal: for example : After each 5mm or (5 seconds depending on the sampling rate and speed of my motor) i ...
0
votes
2answers
244 views

Detection of sharp peaks in an audio signal

I have an audio signal and I'm interested to detect the very sharp peaks. If I zoom, here is something that should NOT be detected (this is voice actually): NO GOOD Here is something that should be ...
3
votes
2answers
114 views

periodicity coefficient

I wonder if an efficient method exist to compute how much a signal is periodic, it should be ~1.0 when the signal is totally periodic (like a sinusoïdal signal) and ~0.0 when totally random, like a ...
2
votes
2answers
149 views

Pitch detection to find music notes (from voice)

Hi signal processing community, currently I am searching a topic for my master thesis in computer science and since I am a very good singer I want to do something with music. I thought about a topic ...
0
votes
3answers
295 views

harmonic product spectrum on guitar string signals

i am trying to create a program that gets the fundamental frequency of the signal coming from a guitar string to identify what note is being played, is harmonic product spectrum the algorithm the most ...
0
votes
2answers
191 views

Harmonic estimation from a single note

I have a recording of a single note played several times on a violin. I'm working with Matlab to estimate the amplitude of the first N harmonics. I already know which note is played but there can be ...
0
votes
1answer
235 views

Note segmentation from pitch values

My goal is to extract a melodic respresentation for monophonic signal like voice. I have used YIN algorithm to find the pitch of the signal. Now I want to detect notes from the pitch values (like ...
3
votes
1answer
188 views

How to prevent Octave Jumping in ACF of Speech Signal?

I'm working with speech signals and my aim is to estimate the fundamental frequency $\ F_0$ of this signal often called as "pitch". The main idea is taking small blocks of the speech signal such ...

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